Process for decabromodiphenylalkane predominant product

  • US 5,124,496 A
  • Filed: 11/01/1990
  • Issued: 06/23/1992
  • Est. Priority Date: 11/01/1990
  • Status: Expired due to Term
First Claim
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1. A process for preparing a flame retardant product predominant in decabromodiphenylalkane, the process comprising:

  • forming a stirrable first reaction mass by feeding molten diphenylalkane to a reaction vessel to which a bromination catalyst and bromine had been previously charged;

    maintaining the first reaction mass at a temperature in the range of from about 0°

    C. to about reflux during the feeding;

    subsequent to the feeding, separating the decabromodiphenylalkane predominant product from the bromine and catalyst;

    forming a stirrable second reaction mass from the separated product and a treatment solution; and

    maintaining the second reaction mass for a period of time and at a temperature which is sufficient to obtain the decabromodiphenylalkane predominant product.

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